What are the rules of the arrangement of the series 1,1,1,3,1,5,1,7
Every two are a group, (1,1) (1,3) (1,5) (1,7) (1,9) (1,11)
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- 1. Sequence 1,3,4,7,1,8,9,7, (). 3.9... What are the rules of this sequence
- 2. I would like to ask prawn: for the sequence 1,2,4,7,11,16,22,29 --- how to find the sum of the first n terms?
- 3. 1,3 / 6,3 / 4,7 / 10,2 / 3,9 / 14,
- 4. At 1, 4, 9, 16, 25 What is the nth number in the regular sequence
- 5. There is a sequence 1 - 2 - 3 4 - 5 - 6 7 - 8 - 9 10 - 11 - 12 13?
- 6. In the following regular sequence, the nth number is (). 1, 4, 9, 16, 25
- 7. Find sequence 1, 2, 4, 7, 11, 16 The general term formula of
- 8. A general term of sequence 1,2,4,7,11
- 9. There is a sequence: 1,2,2,4,3,8,4,16,5... Then its 100th term is
- 10. Seeking sequence: 1, 3 / 4, 5 / 8 What is item 100 of If you find the sequence: 1, 3 / 4, 5 / 8, 13 / 24 What's item 100?
- 11. Existing sequence: 8,1,6,4,3,7,0,1,3. What is their regular arrangement? This is an independent recruitment test. I hope you can give some reliable answers
- 12. Five sixth grade math problems, help It's all about cylinders 1. Diameter = 8 cm, height = 4 cm, find the surface area of the cylinder 2. Radius = 5cm, height = 25cm, find the surface area of the cylinder 3. Perimeter = 62.8 cm, height = 4 cm, find the surface area of the cylinder 4. The side view of a cylinder is square, and the diameter of its bottom is 6cm 5. The side area of a cylinder is 251.2 square centimeters, and the height is 10 centimeters. What is the radius of its bottom? What is the bottom area? Brothers and sisters, aunts and aunts, aunts and uncles, help me!
- 13. 1. Arrange the natural numbers as shown in the figure below. In this arrangement, the number 9 is in the third place and the second column? 1 2 4 7 11 16... 3 5 8 12 17... 6 9 13 18... 10 14 19... 15 20... 21... ... 2. There is a new operation *, which is defined as 1 2 x*y=---+ ----------- x+y (x=1)(y+a) one Known 5 * 2=--- 9, 3 * 2 3. # denotes a new operation symbol. It is known that 2 # 3 = 2 + 3 + 4, 6 # 2 = 6 + 7, 3 # 5 = 3 + 4 + 5 + 6 + 7. According to this rule, n # 8 = 228, what is n? 4. For any two natural numbers a and B, a # B = a (a + 1) (a + 2). (a + B-1), if (x # 3) # 2 = 3660, find X 5. Let m and n be natural numbers, am denote the sum of the digits of M, an denote the sum of the digits of N, and m * n denote the remainder of M divided by N. given that the sum of M and N is 8088, find the value of (am + an) * 9 You can answer as many questions as you can
- 14. After the true fraction A7 is changed into a decimal, if the sum of several consecutive digits from the first digit after the decimal point is 1992=______ .
- 15. 1. The local train and the express train leave from the same station, and the local train is in the front, 48 kilometers per hour. After a period of time, the express train leaves from the same station, 72 kilometers per hour. After 2.5 hours, the express train catches up with the local train. How long did the local train take before the express train leaves? 2. Two water injection pipes inject water into the pool. A fills the pool for 5 hours and B fills the pool for 10 hours. How long does it take for two pipes to inject water at the same time to fill half of the pool? 3. To process a batch of parts, Party A and Party B shall work together for 4 days and Party A shall work alone for 6 days. Party A shall work for 2 days first and Party B shall work alone for the rest. How many days does it take for Party B to finish the rest? 4. To process a batch of parts, it takes 10 hours for Party A to do it alone, 8 hours for Party B to do it alone, and after 4 hours for Party A and Party B to do it together, the rest will be done by Party B alone. How long does it take for Party B to do the rest? 5. The teacher divided the candy for the children. If each person had 8, there would be 24 more. If each person had 10, there would be 2 less. How many students were there? 6. If someone makes 11 parts per hour within the specified time, he can finish them one hour ahead of time. If he makes 10 parts per hour, he can overfulfil 3 parts. How many parts are there in this batch? 7. Five carriages and four trucks can carry 24 tons of goods at a time, and ten carriages and two trucks can carry 21 tons of goods at a time? 8. Raising 8 horses and 15 cattle requires 162 kg of hay per day. It is known that feeding 5 horses needs 3 kg more hay per day than feeding 7 cattle. How many kg of hay does it need to feed a horse per day? What about cattle?
- 16. Sixth grade math 69 7 There are 42 passengers on K7 bus, which is two times more than that at the time of departure. How many passengers are there at the time of departure?
- 17. There are four cuboid beads of equal size in the hall. The bottom of each pillar is square, with a side length of 0.6 meters and a height of 4.2 meters. Now, how many square meters does it take to paste marble wall tiles on the surface of the pillars?
- 18. 100 7 If a kind of children's book is sold at the original price, it will make a profit of 0.24 yuan per book. Now it will be sold at a lower price. As a result, the sales volume will double and the profit will increase by 50%. How much will the price of each book be reduced
- 19. Given the equations 4x − 5Y + 2Z = 0 (XYZ ≠ 0), then x: Y: Z is equal to () A. 2:1:3B. 3:2:1C. 1:2:3D. 3:1:2
- 20. When you buy a car, you have to pay 10% more in installments. If you pay in cash, you can get a 95% discount. Uncle Lin calculates that there is a difference of 1800 yuan between the two methods. How much is the original price of the two cars The road repair team built a road, and 10 people built 800m in 10 days, which is exactly 1 / 9 of the road. According to this calculation, how many days will it take to complete the road